Fonda, brother of Jane and son of Henry, is best known for his role in 1969's "Easy Rider", which he co-wrote and produced. He starred alongside Dennis Hopper and Jack Nicholson. He earned an Oscar nomination for his performance.
A statement from the family said, "In one of the saddest moments of our lives, we are not able to find the appropriate words to express the pain in our hearts. While we mourn the loss of this sweet and gracious man, we also wish for all to celebrate his indomitable spirit and love of life."
Jane Fonda also released a statement on her own, saying, "I am very sad. He was my sweet-hearted baby brother. The talker of the family. I have had beautiful alone time with him these last days. He went out laughing."
Aside from his sister Jane, Fonda survived by his wife Margaret and his children, Bridget and Justin.
